package com.antd.gateway.handler;

import com.antd.common.core.util.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Mono;

import java.util.Optional;

import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR;

/**
 * TODO
 *
 * @author 子丶沫
 * @version 1.0
 * @date 2020/11/19 15:15
 */
@Slf4j
@Component
public class HystrixFallbackHandler implements HandlerFunction<ServerResponse> {
    @Override
    public Mono<ServerResponse> handle(ServerRequest request) {
        Optional<Object> originalUris = request.attribute(GATEWAY_ORIGINAL_REQUEST_URL_ATTR);
        originalUris.ifPresent(originalUri -> log.error("网关执行请求:{}失败,hystrix服务降级处理", originalUri));

        return ServerResponse
                .status(HttpStatus.OK.value())
                .contentType(MediaType.APPLICATION_JSON)
                .body(BodyInserters.fromValue(R.error("网关执行请求:失败,hystrix服务降级处理")));
    }
}
